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Method and Device for the Continuous Production of Polymers by Radical Polymerization

a technology of radical polymerization and polymerization method, which is applied in the direction of liquid-liquid reaction process, transportation and packaging, chemical/physical/physico-chemical process, etc., can solve the problem that special materials that are extremely expensive should be dispensed, and achieve the desired activity of polymerization, and reduce the effect of molar mass distribution

Active Publication Date: 2014-03-27
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a process for continuously producing free-radical polymers with a defined, narrow molar mass distribution. This process should be energy-efficient, without requiring preheating, and should ideally not cause any blockages or corrosion issues when using certain monomers. Additionally, this process should ideally not require the use of expensive specialty materials.

Problems solved by technology

Extremely expensive specialty materials should especially be dispensed with.

Method used

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  • Method and Device for the Continuous Production of Polymers by Radical Polymerization
  • Method and Device for the Continuous Production of Polymers by Radical Polymerization
  • Method and Device for the Continuous Production of Polymers by Radical Polymerization

Examples

Experimental program
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Effect test

process example 1

[0227]An aqueous acrylic acid solution (50% by weight) was mixed at room temperature homogeneously with an aqueous sodium persulfate solution (2% by weight) by means of a micromixer and then homogeneously with an aqueous solution of 2-mercapto-ethanol (10% by weight) by means of a second micromixer. The resulting reaction solution was pumped in each case through a preheated reaction capillary whose temperature was controlled in an oil bath with a constant flow rate, and the reaction capillaries had different temperatures, materials, diameters and lengths according to table 1 (all feeds by means of laboratory HPLC pumps, from Bischoff).

[0228]In example 4, in a departure therefrom, an aqueous 7% by weight sodium persulfate solution and an aqueous 50% by weight solution of 2-mercaptoethanol were used.

[0229]In example 5, in a departure therefrom, an aqeuous 3% by weight 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride solution (obtainable, for example, under the VA044 name from...

process example 2

[0231]The aqueous solution of acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid

[0232](35:15% by weight) was fed to a micromixer continuously and homogeneously with an aqueous sodium persulfate solution (4% by weight), mixed therein and then mixed homogeneously at room temperature with an aqueous solution of sodium hypophosphite (10% by weight) in a second micromixer. The resulting reaction solution was pumped continuously with a defined flow rate through a reaction capillary whose temperature was controlled in an oil bath, and the reaction capillaries had different temperatures, materials, diameters and lengths according to table 3.

TABLE 3FlowInitiatorRegulatorInternalØLengthrate[% by[% byTemperatureExampleMaterial[mm]1)[m]1)[g / h]wt.]2)wt.]2)*[° C.]1stainless1.6 + 3.010 + 107302580steel1.45712stainless1.6 + 3.010 + 108302580steel1.45711.1)x + y means: In the first capillary, the internal diameter was x mm or the length was x m and, in the directly connected second capillary...

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Abstract

The present invention relates to a method for the continuous production of a polymer by radical polymerization, wherein at least three materials are mixed with microstructures in one or more mixers and are then polymerized in at least one reaction zone.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional of U.S. application Ser. No. 12 / 990,734, filed Nov. 2, 2010, the entire contents of which is hereby incorporated by reference in this application in its entirety. U.S. application Ser. No. 12 / 990,734 is a national stage application (under 35 U.S.C. §371) of PCT / EP2009 / 055296, filed Apr. 30, 2009, which claims benefit of European application 08155607.8, filed May 2, 2008, the entire contents of each of which are hereby incorporated by reference in this application in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to a process for continuously preparing a polymer by free-radical polymerization, in which at least three feedstocks are mixed in one or more mixers with microstructures and then polymerized in at least one reaction zone.[0003]WO 99 / 54362 describes a process for continuously preparing polymers, in which at least two reactants are conducted through and combined by a micr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01F5/06B01J14/00C08F2/10
CPCB01F5/0602B01J14/00C08F2/10C08F2/00C08F2/01C08F220/06C08F2/38C08F20/06B01F25/40B01J19/00B01F25/42
Inventor MATTMANN, WOLFGANGLOTH, WOLFGANGURTEL, BOLETTEGUTLICH-HAUK, ELKEWEIDL, CHRISTIAN HUBERTDAIANDREAS
Owner BASF AG
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